The intrusion comprises a principal mass of c. 5 x 3 km with a narrow extension to the west c. 6km in length.The intrusive rocks comprise a broad range of nepheline syenites and syenites, which tend to occur as lenticular masses conformable with the essentially granitic rocks of the Precambrian basement.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

14 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Gneiss

ⓘ 'Melanocratic nephelinolite'

ⓘ Nepheline-syenite

ⓘ Syenite

Detailed Mineral List:

ⓘ Aegirine-augite

Formula: (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆

Reference: Rao, B. B. (1982). Petrology of the alkaline rocks around Sivamalai, Coimbatore district, Tamilnadu, India. Geologische Rundschau, 71(1), 263-279. Bose, M. K. (1971). Petrology of the alkalic suite of Sivamalai, Coimbatore, Tamil Nadu. Geological Society of India, 12(3), 241-261. Bose, M. K., Roy, A. K. G., & Czygan, W. (1982). K-Rb relations in the alkaline suites of the Eastern Ghats precambrian belt, India. Lithos, 15(1), 77-84. Czygan, W., & Goldenberg, G. (1989). Petrography and geochemistry of the alkaline complexes of Sivamalai, Elchuru and Uppalapadu. India. Mem. Geol. Soc. India, 15, 225-240. Rao, T. S., Narayana, B. L., & Gopalan, K. (1994). Rb-Sr age of the Sivamalai alkaline complex, Tamil Nadu. Proceedings of the Indian Academy of Sciences-Earth and Planetary Sciences, 103(3), 425-437.

ⓘ Albite

Formula: Na(AlSi₃O₈)

ⓘ 'Alkali Feldspar'

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

ⓘ Analcime

Formula: Na(AlSi₂O₆) · H₂O

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂

ⓘ Calcite

Formula: CaCO₃

ⓘ Cancrinite

Formula: (Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O

ⓘ Chrysoberyl

Formula: BeAl₂O₄

ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'

ⓘ 'Fayalite-Forsterite Series'

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

ⓘ Graphite

Formula: C

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

ⓘ Muscovite var. Sericite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

ⓘ Natrolite

Formula: Na₂Al₂Si₃O₁₀ · 2H₂O

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

ⓘ Sodalite

Formula: Na₄(Si₃Al₃)O₁₂Cl

ⓘ 'Tantalite'

Formula: (Mn,Fe)(Ta,Nb)₂O₆

ⓘ Titanite

Formula: CaTi(SiO₄)O

ⓘ Zircon

Formula: Zr(SiO₄)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Graphite	1.CB.05a	C
Group 4 - Oxides and Hydroxides
ⓘ	Chrysoberyl	4.BA.05	BeAl₂O₄
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Aegirine-augite	9.DA.20	(Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Analcime	9.GB.05	Na(AlSi₂O₆) · H₂O
ⓘ	Cancrinite	9.FB.05	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Sericite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Natrolite	9.GA.05	Na₂Al₂Si₃O₁₀ · 2H₂O
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Sodalite	9.FB.10	Na₄(Si₃Al₃)O₁₂Cl
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
Unclassified Minerals, Rocks, etc.
ⓘ	'Alkali Feldspar'	-
ⓘ	'Amphibole Supergroup'	-	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Apatite'	-	Ca₅(PO₄)₃(Cl/F/OH)
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
ⓘ	'Columbite-(Fe)-Columbite-(Mn) Series'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Tantalite'	-	(Mn,Fe)(Ta,Nb)₂O₆

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
H	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
H	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
H	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Be	Beryllium
Be	ⓘ Chrysoberyl	BeAl₂O₄
C	Carbon
C	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
C	ⓘ Calcite	CaCO₃
C	ⓘ Graphite	C
O	Oxygen
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
O	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
O	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
O	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
O	ⓘ Calcite	CaCO₃
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
O	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
O	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Chrysoberyl	BeAl₂O₄
O	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
F	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
F	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Na	Sodium
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Na	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Na	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Na	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Na	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
Mg	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Al	Aluminium
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Al	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Al	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Al	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
Al	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Al	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Chrysoberyl	BeAl₂O₄
Si	Silicon
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Analcime	Na(AlSi₂O₆) · H₂O
Si	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Si	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Si	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
Si	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Si	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Titanite	CaTi(SiO₄)O
P	Phosphorus
P	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
S	Sulfur
S	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Cl	Chlorine
Cl	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Cl	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Cl	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
K	Potassium
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
K	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ca	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Ca	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
Ti	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Ti	ⓘ Titanite	CaTi(SiO₄)O
Mn	Manganese
Mn	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
Fe	Iron
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂ or Simplified: K(Mg,Fe)₃AlSi₃O₁₀(OH)₂
Fe	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Nb	Niobium
Nb	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
Ta	Tantalum
Ta	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆

Geochronology

Mineralization age: Neoproterozoic : 623 ± 21 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic Time

Rocks, Minerals and Events

623 ± 21 Ma

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Woolley A.R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe, p.115

Rao, B. B. (1982). Petrology of the alkaline rocks around Sivamalai, Coimbatore district, Tamilnadu, India. Geologische Rundschau, 71(1), 263-279.

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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